Disk harrow



' (No Model.) 3 SheetsSheet 1.

H. D. BLAKEMORE.

DISK HARROW. No. 410,573. Patented Sept. 10, 1889.

JEYVEJZZZF UNITED STATES PATENT OFFICE.

HERBERT D. BLAKEMORE, OF MOLINE, ILLINOIS.

DISK HARROW.

SPECIFICATION forming part of Letters Patent No. 410,573, dated September 10, 1889.

Application filed October 27, 1888. Serial No. 289,308. (No model.)

To all whom, it may concern.-

Be it known that I, HERBERT D. BLAKE- MORE, of the city of Moline, in the county of Rock Island and State of Illinois, have invented certain new and useful Improvements in Disk Harrows, of which the following is a specification.

My invention relates to that class of earth cultivating machines known as disk harrows or cultivators, wherein the stirring or pulverizin g of the soil is efiected by means of metal disks rotating in a vertical plane, and especially to that style of machine wherein the angle of the disks with reference to the line of draft may be varied or changed as the varying condition of the soil or the character of the work to be done may require.

This invention consists of a series of independently-pivoted disks connected to move simultaneously in the same direction, each disk having the pivot vertically over and in the plane of its cutting-edge, so that the adjustment of the disks is effected without displacing them laterally, and thereby lessening the strain on the parts during the adjustment.

The invention also consists in certain c011- structions and arrangements of parts, hereinafter described.

In the drawings, Figure 1 is a plan View of a machine embodying my invention, in which two series of disks are employed, each series of disks being capable of independent adjustment with relation to the line of draft. Fig. 2 is a longitudinal section taken to one side of the draft-beam. Fig. 3 is a cross-section illustrating one of the disks and means employed for attaching it to the beam. Fig. 4 is a plan view showing a modified form of my invention and in which two series of disks are employed, both series of disks being adapted to be simultaneously adjusted in the same direct-ion. Fig. 5 is a detail front elevation of the machine shown in Fig. 4. Figs. 6 and '7 are plan views of the central portions of another modified form, and showing the method of simultaneously adjusting several series of disks in opposite directions. Fig. 8 is a detail view of a yoke-thimble forming a bearing for the diskyoke or hanger.

The principle of my invention may be em bodied in a machine carrying any ordinary number of disks arranged either in series or in a single set, and will be effective whether a flat-sided, curved, or any other shaped disk be employed.

For convenience I have illustrated and will describe my invention as embodied in a harrow carrying twelve concavo-convex disks arranged in two series of six each, the disks of each series arranged in relatively opposite directions with the concavity of the disks of each series facing toward the center of the machine. I also employ a single stationary beam at right angles to the draft-pole, this being the simplest as well as most desirable form of machine.

A is the harrow-beam, which is arranged at right angles to the draft pole or beam B and to which it is firmly secured. The draft pole or beam 13 extends in rear of the harrow-beam A, and at or near its rear extremity there is secured by a curved spring a a drivers seat I), while in front of the harrow-beam are provided the usual draft attachment. (Not shown.) The harrow-beam and draft-pole are braced and rigidly held together by the braces 0, arranged to connect said pole-beam either in front or in rear of the latter, or both, as'

may be desired or found necessary.

0 represents a disk yoke or hanger, which comprises two downwardly-projecting hangers d, between which is journaled a disk D.

.The hangers (Z are connected at their upper ends and provided with a centrally-located and preferably integral stem 'or spindle (1, which extends through an opening 01 in the draft-beam A, and is adapted to turn laterally therein.

E represents thimbles which fit in the opening, both at the upper and lower end thereof. These thimbles each comprise a cylindrical hollow portion 6, having one or more tapering or Wedgeshaped ribs e on their exterior faces, and are provided at one end with a wide annular flange 6 These thimbles are driven into the opening 01 until the inner faces of the annular flanges are flush with the surface of the beam, the ribs 6 entering the wood on the sides of the hole and serving to securely hold the thimbles in place without the use of screw-bolts or other extraneous means. The hollow cylindrical portions of the thimbles form a bearing for the yoke stein or spindle d, and the annular flange of the lower thimble affords a seat for the arch or connecting portion between the two hangers. The flange of the upper thimble alfords a bearing for a yoke-arm, as will be hereinafter more fully described. Upon the rear of the disk-yoke, extending downwardly from its arch, is a thin sheet of metal f, either cast integral therewith or secured thereto, and provided with a slit conforming to the shape of the disk, which serves not only as a scraper therefor, but also strengthens the yoke. That :5 portion of the spindle which projects through and beyond the opening d in the beam A is provided with a square or angular upper end or head f, which fits in a correspondinglyshaped opening in a yoke-arm f and t-heiah 2o ter is held in place upon said head by means of a nut f which engages the threaded upper end of said spindle. The outer or front ends of the yoke-"arm's (of which there is one for each yoke) are pivotally' connected to le- 2 5 ver=rods F, which are in turn pivoted at their inner ends to an actuating lever or levers G, pivoted to the beam A, 01" other suitable part of the machine. I

The lever or levers G- are provided with spring-actuated pawls g, adapted to be operated by finger-levers g, suitably pivoted and connected with said pawls. The pawl's' are adapted to engage segment raeks H, which are preferably secured to the beam A; and the 5 operating-levers G are in easy reach of the drivers seat; It will thus be seen that the disk-yokes and their disks are by means of theyoke-arms', the connecting-rods, and levers brought Within control of the driver, while 40 the machine is in operation, and that by the l employment of the pawls and segment-Tacks that the disks may be readily locked in their adjusted position. The disk is, as shown,

pivoted between the hangers cl, and is pro vided with along hollow extension or hub on its concave side to retain the disk in a verti= cal position with its cutting edge in the same plane as the yoke stem or pivot and prevent;

its wabbling. Where each of the series of disks is to be independently adjustable, each series of yoke-arms is provided with its sepa-' rate connectingwod, which is attached to an independent lever working in an independent segment-rack,as shown in Figs. 1 and 2'.- Where 5 5 all the dis-ks are to be actuated at one timein the same direction,all the yoke-arms are-pivotally connected to a single rod which extends nearly the entire length of the beam A, and a single lever and rack are employed, as shown 66 in Fig. 4. In this case the connecting-rod is provided with an upwardly-extending pin h,

which works in an elongated slot in the outer end of the lever.

In Figs. 6 and 7 I have illustrated. another form of means for actuating the disks. In this case a single lever I is employed, and this lever is provided with curved arms 2', having curved slots 1', which are engaged by pins or extensions 2' on the inner ends of the connecting-rods. By this construction itjwill be seen that upon operating the lever the disks will be simultaneously adjusted in opposite directions. V

r In the several forms of machine shown when the lever-handles are in line with the draft the disks are in like line. When the lever-handles are adjusted out of line with the draft, the disks, through the connecting-rods, yokearnis, and spindle, are thrown out of line with the draft, and by means of the segment=raek and spring are secured or locked in any desired adjustment.- I

It will be observed that by the relative con= struc-tion and arrangement of the parts, as herein shown and described, the disks are capable of adjustment or angling in and out from the center of the machine, shown by dotted lines in Figs. 1, 6, and 7,- an obvious advantage over many of the prior inventions in which the adjustment is only in one direction' '=that is, either in or out-.- I

Obviously" my invention may, with a few changes rendered necessary'by the difference in general construction, be embodied in harjI'OWS having a rectangular,- triangular, or

to the pole, and I do not, therefore,- limit myself to the particular form of machine here shown; nor do I limit myself to the specific 2 construction of the parts described, as changes which fall within the scope of my invention may from time to time suggest themselves.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

The combination, with the barrow-beam, the disks, and their yokes' having spindles free to turn in said beam, of the yoke-arms fast at one end to the said spindles, the leverrods pivotally connecting the outer ends of the yoke-arms,- and the lever G G, pivotally connected to the beam on a common vertical pivot, with their" shorter arms crossed andpivotally connected to the adjacent ends of the lever, substantially as shown and described.

HERBERT D. BLAKEMORE. Witnesses-:-

F. A. WILL AMs, FRANK J. HAUGS. 

